I am not familiar with the term, "federated" or its meaning... I'm hoping to get some serious answers and perhaps even some comedic answers....
Edit: thank you to all who answered my call for enlightenment. I'm even more confused (and hopeful) than I was before!
So almost the opposite of a "sub" reddit, or a "sub" community... maybe a "super" something or other...?
It works verbally, I suppose, but its more appropriate to describe them as adjacent than vertical.
We're doing a big social media commune.
Got it, thank you